 [det]load_public_key(+Stream, 
-PublicKey)Load a public key PublicKey from the given stream Stream. 
Supports loading both DER- and PEM-encoded keys. The key must be an RSA 
or EC key. DH and DSA keys are not supported, and
PublicKey will be bound to an atom (dh_key or dsa_key) if you 
try and load such a key. Otherwise PublicKey will be unified 
with
[det]load_public_key(+Stream, 
-PublicKey)Load a public key PublicKey from the given stream Stream. 
Supports loading both DER- and PEM-encoded keys. The key must be an RSA 
or EC key. DH and DSA keys are not supported, and
PublicKey will be bound to an atom (dh_key or dsa_key) if you 
try and load such a key. Otherwise PublicKey will be unified 
with public_key(KeyTerm) where KeyTerm is an rsa/8 
term representing an RSA key, or ec/3 for 
EC keys.